rays

PImage myImage;
color col;
float sw, br, incr;
PVector ray;

void setup() {
  background(0);
  colorMode(HSB, 100);
  myImage = loadImage("http://media-cache-ak0.pinimg.com/736x/d2/49/ac/d249ac18b4a86e9a6383e5c2909eabf1.jpg");
  size(myImage.width, myImage.height);
  myImage.loadPixels();
  incr = 5;
  image(myImage, 0, 0);
  ray = new PVector(random(1,2), random(1,2));
  ray.normalize();
  ray.mult(int(random(10,150)));

  for (int x = 0;  x<width; x += incr) {
    for (int y = 0; y < height; y += incr) {
      col = myImage.pixels[y*width+x];
      sw = map(brightness(myImage.get(x, y)), 0, 100, 20, 40) ;
      br = brightness(myImage.get(x, y));

      println(ray);
      if (br>50) {
        stroke(myImage.get(x, y), random(255));
        strokeWeight(1);
        line(x, y,x+ray.x,y-ray.y);
      }
    }
  }
}

void draw() {

}

void keyPressed() {
  save(random(123)+".png");
}